/*
 * Copyright 2021-2021 Monkey Group.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.monkey.mmq.rule.engine.feature;

import net.sf.jsqlparser.expression.Expression;
import org.monkey.mmq.rule.engine.ReactorQLMetadata;
import org.monkey.mmq.rule.engine.ReactorQLRecord;
import reactor.core.publisher.Flux;

import java.util.function.Function;

/**
 * 分组支持,用来创建对Flux进行分组的函数
 *
 * @author solley
 * @since 1.0
 */
public interface GroupFeature extends Feature {

     Function<Flux<ReactorQLRecord>, Flux<Flux<ReactorQLRecord>>> createGroupMapper(Expression expression, ReactorQLMetadata metadata);

}
